Woven wire belt for paper making machines



Jan. 5, 1937.

. H. G. SPECHT WOVEN WIRE BELT FOR PAPER MAKING MACHINES Filed March 17, 1954 IN V EN TOR. HHRRY E. EIFEBI-IT.

A TTORNEY.

Patented Jan. 5, 1937 UNITED STATES WOVEN WIRE BELT FOR PAPER, MAKING MACHINES Harry G. Specht, Montclair, N. J., assignor to Eastwood-Nealley Corporation, Belleville, N. J a corporation of New Jersey Application March 17, 1934, Serial No. 716,126

6 Claims.

The present invention relates to woven wire belts particularly for paper making machines of the Fourdrinier type. an object being to provide a belt of increased strength and durability, by

5 incorporating in the warp at suitable intervals reinforcing wires of greater tensile strength and hardness, or other characteristics'designed to increase strength and durability, and at the same time to incorporate such reinforcing l warp wires in a manner to provide a belt which will not crack, deform or wrinkle, as has been the case with previous types of belts in which reinforcing warp wires were incorporated. Many attempts have been made heretofore to 15 weave reinforcing warp wires into the wire cloth,

such wires being of an alloy having a greater tensile strength and hardness than the main body of the warp. Thus brass warp wires have been used in the body of the warp for cheapness together 20 with reinforcing warp wires disposed at suitable intervals, say every inch or quarter inch, and these have been of .various alloys, as for instance bronze, stainless steel, Monel metal, etc.

In the process of weaving Fourdrinier wires,

25 the warp wires are wound on the back beam of the loom and must be very carefully placed, with all the wires of even tension on the beam. When warp wires of two diflferent alloys of different tensile strength, hardness, or other character- 30 istics are used, the two alloys are generally arranged on the beam at some predetermined spacing, so that they will be evenly spaced in the woven cloth. Thus if stainless steel and bronze are used, every 6th or 10th warp wire will be 35 stainless steel and the balance bronze.

Obviously when two alloys areusedmne being of greater tensile strength than the other, the latter will usually have a lower elongation. Thus bronze wire with an elongation of 6 inches to the I 40 foot and a tensile strength of 75,000 pounds to the inch is woven with stainless steel with an elongation of 3 inches to the foot and a tensile strength of 150,000 pounds to the inch. It is practically impossible to make two alloys with 45 the same physical properties and stfll have them possess the qualities necessary for weaving them into Fourdrinier wires. Thus in the past when two different alloys were woven into a wire cloth, the difference in elongation would cause the cloth 50 to deform, crack and wrinkle, and unevenness would result from the fact that the weft wires would not be deformed by the higher tensile strength alloy the same as by the lower tensile strength alloy, so that such wire cloth was en- 55 tirely unsuitable for Fourdrinier wires where a uniform wire cloth structure free from wrinkles is essential.

It is particularly proposedin the present invention to weave the reinforcing warp wires into the cloth with a different weave than the other 5 warp wires to the end that such different weave will compensate for and equalize the differential characteristics of the two alloys employed.

With the above and other objects in view an embodiment of the invention is shown in the. accompanying drawing, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawing: 16

Fig. 1 is an enlarged plan view of a portion 0 a wire belt, woven according to the invention.

Fig. 2 is a longitudinal sectional view, taken along the line 22 of Fig. 1.

Fig. 3 is a longitudinal sectional view taken 20 along the line 3-3 of Fig. 1.

Fig. 4 is a transverse sectional view taken along the line 4-4 of Fig. 1.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing.

Referring to the drawing, the Fourdrinier wire, according to the exemplary illustrated embodiment shown therein, comprises warp wires l0, of brass, bronze or other suitable metal, making up the body of the warp and woven with the weft wires I l by the usual weave in which the warp wires pass over one and under one weft wire. At suitable intervals the reinforcing warp wires II are provided, these being of a different alloy as bronze, stainless steel, Monel metal, or the like designed for tensile strength, hardness, or any other characteristics desired in such reinforcing warp wires, and theseare woven into the cloth in a manner to compensate for the difference in 40 elongation over the warp wires ID, the weave as illustrated being of the long knuckle type in. which the warp passes over one weft wire and under two weft wires.

It will thus be seen that by weaving the higher strength alloy having lower elongation with long knuckles on the bottom and short knuckles on the top, and the lower stren th alloy having higher elongation with short knuckles at both the bottom and top, the different physical qualities inherent in the wires is compensated for and a smooth, stronger and better woven wire results, having the desired characteristics essential to a practicable and efficient Fourdrinier wire.

It will be understood that other weaves than those illustrated may be employed as long as the weave of the reinforcing warp wires is different from the other warp wires and designed to accomplish the purpose of the invention.

I have illustrated and described a preferred and satisfactory embodiment of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof as defined in the appended claims.

Having thus described my invention what I claim and desire to secure by Letters Patent is:-

1. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, some of said warp wires beingof one material. and others being reinforcing wires and of a different material, said other warp wires being differently woven in relation to the weft wires than the remainder of the warp wires, said different weave being continued uniformly throughout the length of the woven wire cloth and adapted to compensate for variation in elongation of said different materials whereby elongation of the entire woven wire cloth in the direction of the warp is equalized. I,

2. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, said warp wires including spaced reinforcing warp wires of a different material from the remainder of the warp wires, said reinforcing warp wires being differently woven in relation to the weft wires than'the remainder of the warp wires, said different weave being continued uniformly throughout the length of the woven wire cloth and adapted to compensate for variation in elongation of said diflerent materials whereby elongation of the entire woven wire cloth in the direction of thewarp is equalized.

3. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, said warp wires including reinforcing warp wires of a different tensile strength than the remainder of the warp wires, said reinforcing warp wires being differently woven in relation to the weft wires than the remainder of the warp wires, said different weave being continued uniformly throughout the length of the woven wire cloth and adapted to compensate for variation in elongation of said different materials whereby elongation of the entire woven wire cloth in the direction of the warp is equalized.

4. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, some of said warp wires being of one material having-a predetermined tensile strength and elongation and others being of a different, material having a higher tensile strength and lower elongation than the remainder of the warp wires, said other warp wires being woven with long knuckles at one side of the cloth and the remainder of the warp wires being woven with short knuckles at said one side of the cloth said different weave adapted to compensate for variation in elongation of said diflerent materials whereby elongation of the entire woven wire cloth in the direction of the warp is equalized.

5. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, some of said warp wires being of one material having a predetermined tensile strength and elongation and others being of a different material having a higher tensile strength and lower elongation than the remainder of the warp wires, said other warp wires being successively woven over one and under a plurality weft wires, and the remainder of the warp wires being successively woven over one and under one weft wire said different weave adapted to compensate for variation in elongation of said different materials whereby elongation of the entire woven wire cloth in the direction of the warpis equalized.

6. Woven wire cloth for paper making machines, comprising interwoven warp and weft wires, some of said warp wires being of one material having a predetermined tensile strength and elongation and others being of a different material having a higher tensile strength and lower 1 elongation than the remainder of the warp wires, said other warp wires being successively woven over one and under two weft wires, and the re- 

